arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.08223stat.MEecon.EMmath.STstat.TH
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多协变量的长期预测区间

Long-term prediction intervals with many covariates

Sayar Karmakar, Marek Chudy, Wei Biao Wu

摘要:

准确预测是计量经济学时间序列研究的基本问题之一。通常,从业者和政策制定者希望预测未来整个时间范围的结果,而不仅仅是单个$k$ -提前一步预测。这些序列,除了其自身可能的非线性相关性,往往也受到许多外部预测因素的影响。在本文中,我们构造预测区间的时间聚集预测在高维回归设置。我们的方法是基于流行的LASSO例程获得的残差的分位数。我们允许一般重尾,长记忆,非线性平稳误差过程和随机预测。通过一系列系统安排的一致性结果,我们提供了我们提出的基于分位数的方法在所有这些情况下的理论保证。在使用模拟验证了我们的方法之后,我们还提出了一种新的基于自举的方法,该方法可以提高理论区间的覆盖率。最后分析EPEX现货数据,我们构建预测区间每小时的电价跨越17周的视野,并将其与选定的贝叶斯和自助区间预测进行对比。

英文摘要:

Accurate forecasting is one of the fundamental focus in the literature of econometric time-series. Often practitioners and policy makers want to predict outcomes of an entire time horizon in the future instead of just a single $k$-step ahead prediction. These series, apart from their own possible non-linear dependence, are often also influenced by many external predictors. In this paper, we construct prediction intervals of time-aggregated forecasts in a high-dimensional regression setting. Our approach is based on quantiles of residuals obtained by the popular LASSO routine. We allow for general heavy-tailed, long-memory, and nonlinear stationary error process and stochastic predictors. Through a series of systematically arranged consistency results we provide theoretical guarantees of our proposed quantile-based method in all of these scenarios. After validating our approach using simulations we also propose a novel bootstrap based method that can boost the coverage of the theoretical intervals. Finally analyzing the EPEX Spot data, we construct prediction intervals for hourly electricity prices over horizons spanning 17 weeks and contrast them to selected Bayesian and bootstrap interval forecasts.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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